Improvement in car-trucks for prismoidal tracks



E. B. DORSEY.

CAR-TRUCKS FOR PRISMOIDALTR-ACKS. v Patented Dec- 5' No.1 c

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STATES PATENT QEETCE.

` EDWARD B. DORSEY, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENTvIN CAR-TRUCKS FOR PRISMOIDAL TRACKS.

Specification forming part of Letters Patent No. 185,019, dated December 5, 1876; application led October 21, 1876.

To all whom it may concern:

Be it known that I, EDWARD BATES DOR- SEY, ofthe city and county of San Francisco, State of California, have invented an Improvement in Prismoidal Track Locomotives and Cars, of which the following is a specification:

The object of my invention is to provide a means for riding the locomotive and cars over crossings independent ofthe prismoidal track, andwhich shall Anot obstruct the travel of ordinary vehicles over said crossing.

Figure l is a sectional elevation of the prismoidal-track, with the frame carrying the side guiding-wheels of an ordinary car or locomotive, my. improved crossing wheels being shown attached and in position. Fig. 2 is a 'sectional view of present style of prismoidal crossing, showing' how the side guiding-wheels are used to guide the lcars across. Fig. 3 is a view of my conical crossing-wheel, showing convex face. Fig. 4. is a view showing how the two wheels C and E may be cast together, forming one wheel.

Heretofore in constructing prismoidal rolling stock, there has been provided guide- Wheels, which roll against the .sides of the prism, these guide-wheels being allowed to take thelentire weight of the locomotive or car at the crossing, the crossing being formed by simply cutting down the prism to within three or four inches of its base. (See Fig. 2.)

Obviously this three or four inches ot' raised track is a serious obstruction to vehicles passing across it; also it is expensive to keep in repair. Now I propose to dispense entirely grinding' ofthe wheel upon the track, because of its conical shape. If desired, the wheel C may be placed inside the bearing D, between it and the guide-wheel E, or it may be cast with the guide-Wheel E, as in Fig. 4, but this arrangement is not desirable, because it necessitates a too narrow gaged track at the crossing.

'Ihe operation vof my invention is as follows: When the crossing isreached the prismoidal track is cut away entirely, and the rails A Al substituted therefor. Upon these railsthe wheels C C roll over the crossing, taking the weight of the entire car or locomotive until the other side is reached, when the prismoidal track is used as before.

What I claim as my invention, and desire to secure by Letters Patent, is as follows:

The conical Wheels C C and plane wheels E, both secured to the inclined shafts B, as and for the purpose described.

EDWARD B. DORSEY. Witnesses:

R. W. WATERMAN, J. K. FIRTH. 

